Huge differences inside a lot of churches of the same faith too. Will speak to the Lutherans as that is my bread and butter. Keep in mind that nearly all Protestantism came from Martin Luther "nailing it" (btw, I DO NOT claim to be the best Christian. Too much red blooded male in me... However I did help run the POPL Special Needs Group at POP. That's why I understand Porteroso and JR so well. )
The LCMS believes that the Bible is without error in all that it says. The ELCA avoids making such statements, holding that Scripture is not necessarily always accurate on such matters as history and science.
My old church before I moved was Prince of Peace Lutheran in Carrollton. It is part of the Missouri Synod and was a somewhat conservative church.
The Evangelical Lutheran Church in America (ELCA), in 2009, the ELCA voted to allow LGBTQ individuals in committed relationships to serve as clergy. They also support same-sex marriage, aligning with their broader commitment to justice and equality. It is also most certainly true that the church body known as the Evangelical Lutheran Church in America has rejected Lutheranism by embracing transgenderism, just as it has already done by embracing other tenants of the overarching critical theory religion. They have become intolerant toward conservatives:
https://www.exposingtheelca.com/exposed-blog/liberal-elca-lutheran-denomination-becomes-more-intolerant-of-conservatives Facebook Groups at; Memories of: Dallas, Texas, Football in Texas, Texas Music, Through a Texas Lens and also Dallas History Guild. Come visit!